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Unexpected ICC sloweness while starting

Aurelien_C_
Beginner
‎12-15-2016 03:45 AM
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Dear all, we're having a very strange issue in one of our clusters: while running "icc -v", for example the binary gets stuck for several seconds while waiting for something and then the strace output shows a timeout. By searching for the HEX dump surrounding that wait/timeout step we discovered that the issue can be solved by enabling IPv6: echo 0 > /proc/sys/net/ipv6/conf/all/disable_ipv6 (https://github.com/hiboma/hiboma/blob/master/centos7-nss_myhostname-blocking.md - no, I do not read Japanese). Any suggestion on how to permanently disable this check since we don't use IPv6 at all? Any idea why the issue has cropped up just now after many months of use? Regards.
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Yuan_C_Intel
Employee
‎12-15-2016 08:10 PM
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Hi, Aurelien

This is a known issue and caused by a bug in Redhat 7.2. Please refer to below article for a workaround:.  

https://software.intel.com/en-us/articles/long-license-checkout-on-linux-with-ipv6
 
Hope this helps.
 
Thanks.
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